{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "The effect of intra - arterial PGE2 could not be blocked by intra - arterial RP 67 , 580 or SR 48 , 968 , which opens the possibility that the micturition reflex elicited by intra - arterial PGE2 was mediated by pathways other than the reflex initiated when the PG was given intravesically ."}
{"Disease": [], "Chemical": ["PGE2", "PG", "RP 67 , 580", "SR 48 , 968"]}